1 #include <u.h>
2 #include <libc.h>
3 #include <draw.h>
4 #include <mouse.h>
5 #include <frame.h>
6 
7 void
8 _frdrawtext(Frame *f, Point pt, Image *text, Image *back)
9 {
10 	Frbox *b;
11 	int nb;
12 
13 	for(nb=0,b=f->box; nb<f->nbox; nb++, b++){
14 		_frcklinewrap(f, &pt, b);
15 		if(!f->noredraw && b->nrune >= 0)
16 			stringbg(f->b, pt, text, ZP, f->font, (char*)b->ptr, back, ZP);
17 		pt.x += b->wid;
18 	}
19 }
20 
21 static int
22 nbytes(char *s0, int nr)
23 {
24 	char *s;
25 	Rune r;
26 
27 	s = s0;
28 	while(--nr >= 0)
29 		s += chartorune(&r, s);
30 	return s-s0;
31 }
32 
33 void
34 frdrawsel(Frame *f, Point pt, ulong p0, ulong p1, int issel)
35 {
36 	Image *back, *text;
37 
38 	if(f->ticked)
39 		frtick(f, frptofchar(f, f->p0), 0);
40 
41 	if(p0 == p1){
42 		frtick(f, pt, issel);
43 		return;
44 	}
45 
46 	if(issel){
47 		back = f->cols[HIGH];
48 		text = f->cols[HTEXT];
49 	}else{
50 		back = f->cols[BACK];
51 		text = f->cols[TEXT];
52 	}
53 
54 	frdrawsel0(f, pt, p0, p1, back, text);
55 }
56 
57 Point
58 frdrawsel0(Frame *f, Point pt, ulong p0, ulong p1, Image *back, Image *text)
59 {
60 	Frbox *b;
61 	int nb, nr, w, x, trim;
62 	Point qt;
63 	uint p;
64 	char *ptr;
65 
66 	if(p0 > p1)
67 		sysfatal("libframe: frdrawsel0 p0=%lud > p1=%lud", p0, p1);
68 
69 	p = 0;
70 	b = f->box;
71 	trim = 0;
72 	for(nb=0; nb<f->nbox && p<p1; nb++){
73 		nr = b->nrune;
74 		if(nr < 0)
75 			nr = 1;
76 		if(p+nr <= p0)
77 			goto Continue;
78 		if(p >= p0){
79 			qt = pt;
80 			_frcklinewrap(f, &pt, b);
81 			/* fill in the end of a wrapped line */
82 			if(pt.y > qt.y)
83 				draw(f->b, Rect(qt.x, qt.y, f->r.max.x, pt.y), back, nil, qt);
84 		}
85 		ptr = (char*)b->ptr;
86 		if(p < p0){	/* beginning of region: advance into box */
87 			ptr += nbytes(ptr, p0-p);
88 			nr -= (p0-p);
89 			p = p0;
90 		}
91 		trim = 0;
92 		if(p+nr > p1){	/* end of region: trim box */
93 			nr -= (p+nr)-p1;
94 			trim = 1;
95 		}
96 		if(b->nrune<0 || nr==b->nrune)
97 			w = b->wid;
98 		else
99 			w = stringnwidth(f->font, ptr, nr);
100 		x = pt.x+w;
101 		if(x > f->r.max.x)
102 			x = f->r.max.x;
103 		draw(f->b, Rect(pt.x, pt.y, x, pt.y+f->font->height), back, nil, pt);
104 		if(b->nrune >= 0)
105 			stringnbg(f->b, pt, text, ZP, f->font, ptr, nr, back, ZP);
106 		pt.x += w;
107 	    Continue:
108 		b++;
109 		p += nr;
110 	}
111 	/* if this is end of last plain text box on wrapped line, fill to end of line */
112 	if(p1>p0 &&  b>f->box && b<f->box+f->nbox && b[-1].nrune>0 && !trim){
113 		qt = pt;
114 		_frcklinewrap(f, &pt, b);
115 		if(pt.y > qt.y)
116 			draw(f->b, Rect(qt.x, qt.y, f->r.max.x, pt.y), back, nil, qt);
117 	}
118 	return pt;
119 }
120 
121 void
122 frredraw(Frame *f)
123 {
124 	int ticked;
125 	Point pt;
126 
127 	if(f->p0 == f->p1){
128 		ticked = f->ticked;
129 		if(ticked)
130 			frtick(f, frptofchar(f, f->p0), 0);
131 		frdrawsel0(f, frptofchar(f, 0), 0, f->nchars, f->cols[BACK], f->cols[TEXT]);
132 		if(ticked)
133 			frtick(f, frptofchar(f, f->p0), 1);
134 		return;
135 	}
136 
137 	pt = frptofchar(f, 0);
138 	pt = frdrawsel0(f, pt, 0, f->p0, f->cols[BACK], f->cols[TEXT]);
139 	pt = frdrawsel0(f, pt, f->p0, f->p1, f->cols[HIGH], f->cols[HTEXT]);
140 	pt = frdrawsel0(f, pt, f->p1, f->nchars, f->cols[BACK], f->cols[TEXT]);
141 }
142 
143 static void
144 _frtick(Frame *f, Point pt, int ticked)
145 {
146 	Rectangle r;
147 
148 	if(f->ticked==ticked || f->tick==0 || !ptinrect(pt, f->r))
149 		return;
150 	pt.x -= f->tickscale;	/* looks best just left of where requested */
151 	r = Rect(pt.x, pt.y, pt.x+FRTICKW*f->tickscale, pt.y+f->font->height);
152 	/* can go into left border but not right */
153 	if(r.max.x > f->r.max.x)
154 		r.max.x = f->r.max.x;
155 	if(ticked){
156 		draw(f->tickback, f->tickback->r, f->b, nil, pt);
157 		draw(f->b, r, f->tick, nil, ZP);
158 	}else
159 		draw(f->b, r, f->tickback, nil, ZP);
160 	f->ticked = ticked;
161 }
162 
163 void
164 frtick(Frame *f, Point pt, int ticked)
165 {
166 	if(f->tickscale != scalesize(f->display, 1)) {
167 		if(f->ticked)
168 			_frtick(f, pt, 0);
169 		frinittick(f);
170 	}
171 	_frtick(f, pt, ticked);
172 }
173 
174 Point
175 _frdraw(Frame *f, Point pt)
176 {
177 	Frbox *b;
178 	int nb, n;
179 
180 	for(b=f->box,nb=0; nb<f->nbox; nb++, b++){
181 		_frcklinewrap0(f, &pt, b);
182 		if(pt.y == f->r.max.y){
183 			f->nchars -= _frstrlen(f, nb);
184 			_frdelbox(f, nb, f->nbox-1);
185 			break;
186 		}
187 		if(b->nrune > 0){
188 			n = _frcanfit(f, pt, b);
189 			if(n == 0)
190 				break;
191 			if(n != b->nrune){
192 				_frsplitbox(f, nb, n);
193 				b = &f->box[nb];
194 			}
195 			pt.x += b->wid;
196 		}else{
197 			if(b->bc == '\n'){
198 				pt.x = f->r.min.x;
199 				pt.y+=f->font->height;
200 			}else
201 				pt.x += _frnewwid(f, pt, b);
202 		}
203 	}
204 	return pt;
205 }
206 
207 int
208 _frstrlen(Frame *f, int nb)
209 {
210 	int n;
211 
212 	for(n=0; nb<f->nbox; nb++)
213 		n += NRUNE(&f->box[nb]);
214 	return n;
215 }